Reynoutria japonica, or Japanese Knotweed, is an invasive herbaceous perennial. It features hollow, bamboo-like stems, broad leaves, and creamy-white flowers in late summ
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Sunlight
Full sun to partial shade.
Watering
Tolerant of drought but thrives with consistent moisture.
Soil
Highly adaptable, prefers moist, well-drained, fertile soils but tolerates poor, disturbed soils.
Temperature
Highly adaptable to temperate climates, tolerating frost.
Habitat
Outdoor
Fertilizer
Not required; can encourage unwanted growth.
Full sun to partial shade.
Tolerant of drought but thrives with consistent moisture.
Highly adaptable, prefers moist, well-drained, fertile soils but tolerates poor, disturbed soils.
Highly adaptable to temperate climates, tolerating frost.
Outdoor
Not required; can encourage unwanted growth.
Plant Type
Herb
Plant Category
Ornamental, Foliage, Vegetable
Plant Place Type
Ground
Plant Environment
Outdoor
Lifespan
Perennials
Plant Height
1-3 m
Spread
2-5 m
Growth Rate
Very Fast
Dormancy
Winter
Leaf Color
Green
Leaf Type
Ovate
Flower Size
2-4 mm
Optimal Sunlight Lux
60000
Weed Status
Yes
Toxic for humans
Yes
Rating: 2/5
Toxic for pets
Yes
Rating: 2/5
Edible
Yes
Contains oxalic acid, particularly in mature leaves, which can be harmful in large quantities if consumed.
